【作者】 周佳林；

【导师】 郭前岗；

【作者基本信息】 南京邮电大学 ， 控制理论与控制工程， 2011， 硕士

【摘要】 随着人类社会经济的快速发展,对能源的需求越来越大,开发和利用可再生的绿色能源将是实现人类可持续发展必须采取的措施,而太阳能具有储量巨大、不会枯竭、无污染等优点,在未来,太阳能光伏发电将有着良好的发展前景。本文以太阳能光伏发电系统作为研究对象,对光伏发电系统的最大功率跟踪方法、逆变控制系统的硬件电路设计和软件控制方法进行了深入的研究。首先,本文详细介绍了国内外太阳能光伏发电的现状和发展前景,并对光伏发电系统的组成和分类作了简单分析,对光伏发电系统建立了一个初步认识。其次,在熟悉了太阳能电池分类和发电原理的基础上,重点分析和研究了光伏阵列的输出特性和其影响因素;然后介绍了最大功率跟踪常用的跟踪方法,为了减小固定步长的扰动观察法进行最大功率跟踪会导致功率损失的缺陷,本文采用了变步长的扰动观察法来跟踪光伏阵列的最大功率点,它保证了跟踪过程的快速性和稳定性,通过Matlab仿真证明这种方法具有良好的跟踪性能。最后,对光伏发电系统的逆变环节进行了研究,设计了以数字信号处理器为核心的控制电路,以智能功率模块为核心的逆变主电路。采用模块化的编程方法构建了逆变控制系统中的软件功能模块,采用对称规则采样法生成SPWM波,并通过实验验证了该方案的可行性。更多还原

【Abstract】 With the rapid economic development of human society, there is a growing need for energy. The measures of exploiting and using of renewable green energy must be taken to achieve sustainable human development. Solar energy has some advantages such as great reserves, inexhaustible, pollution-free, etc. In the future, solar photovoltaic power generation will have a good development prospect. This paper discusses solar photovoltaic power generation system, making an in-depth study on the maximum power tracking system of photovoltaic power generation system, the hardware design of inverter control system, and control algorithm.Firstly, the paper describes in detail the domestic solar photovoltaic power generation status and development prospects, photovoltaic power generation system has been introduced by the composition and classification, and built on a preliminary understanding.Secondly,based on the introduction of the classification of solar cells and the principle of power generation, the output characteristics of photovoltaic arrays and it’s influencing factors have been analyzed and studied; the commonly used method of maximum power point tracking has been introduced, In order to reduce the fixed step length perturbation and observation method for maximum power tracking defects lead to power loss, and the variable step perturbation and observation method proposed by the composition, it guarantees the fast tracking process and stability, and through Matlab simulation results show that the method has good tracking performance.Finally, photovoltaic inverters have been studied, and DSP as the core of the control circuit as well as IPM as the core of the inverter main circuit have been designed. Modular programming method for inverter control system of software modules construction and symmetry rules sampling for SPWM wave generation have been applied in the paper. The feasibility of the system is verified by experiments.更多还原